Rivet feeding device



Jan. 27, 1948. w. R. KovAcs RIVET FEEDING DEVICE Filed sept. 25, 1945 IN V EN TOR.

5 M Y WM KR RQm .T MA M L H. W

Patented Jan. 27, 1948 emr-ED STATES oifr FEDING'DEVICE- =Wi1lam 2R'. Kovacs?, lCleveland, Ghini, j assigner 'to rIhe Cleveland Pneumatic Tool "Company,-

Cleveland, Ohio,y a' corporation of -Ghio' Application. septemlier 25, 1943, 'serialln0-5'oa'e4 (C1. 'TSS-46) The present invention 'relates to improvements in v devices for manually inserting vrivets or the likev into work openingsy and fai'ms toprovide a device of this' kind which fis more satisfactory and efficient than previous devices and is less likely to become .jammed or to cause marring of the work.

The primary object of the invention resides-in the provision of a rivet feeding device embodying improved vmeans for releasably holding `a plurality of rivets in position to be individually discharged from they delivery end of the device.

'A further object of the invention ris to provide an improved device of the' above character in which there -are employed resilient fingers for retaining then-vets in the tube which are adapted to be engaged and spread bythe delivery end of the tube for releasing the rrivets therefrom, and means engaging-said Vlingers for retaining the innermost rivet in position to preclude its premature discharge from the ltube until said device is inthe desired position for releasing said rivet;

A still further object of the'inventiony is'to provide-an improved device of the character men/ tioned. in which the tube and a resilient thrust member ornose piece engageable with .the `work are `relatively movable .for causing spreading of. of .the resilient fingers and in whichthe thrust member is of. a form such that it is not likely .to cause marring of the work.

Other objects and: `advantages lmore or' vless ancillary to the foregoing reside in the specic constructionand aggroupment of the elements peculiar to this structure, as will become apparent' from a more vcomplete examination .oithisspeci-v flcation.

In the drawing which illustrates the invention:

Fig. 1 is a perspective view illustrating a rivet placing device embodying the features of the present invention, the cover of the device being illustrated in open position in full lines and in closed position in broken lines.

Fig. 2.is an end view thereof'.v

iFig. V3 isa fragmentary vertical .sectional view taken substantially .online 3'-3` of" '2) Fig. 4 is a sectional view similar to Fig. 3 with the parts in a different'position.

Fig. A5 is a perspective View showing the relation 'between rivet gripping. ngers and the feet which engage the work when the device ispushed forward for inserting a rivet into a rivet hole.

'Referring to the drawing for a more detailed description thereof', the improved rivet feeding or placing device is generally designated by tlie reference numeral 8' and includes an elongated hollow'mernner oi-"tube 9*'whinfformsaft/support or .magazine 'adapted' to y"cnnt'ain a 'plnrality fof rivets t0 or other artiel'e's'toibe fed. The-tunen is open at bothY Aends'thereof yand `is"fabricated with a longitudinal slot H in "thewalltlrere A plunger i12 vi's adapted to be inserted :through theopen outer end f3 of thetbe for engagement with the outer' end of lthe series of. rivets'ffl're-y viously placed in. .the tube .as shown in I'Fgs, ".3 and 4, saidplunger being formed with. afliig "H which vprojects through .the slot Il and-is' movable tl'ierealong.` vten-sion spring 'i5 vis .connectedto the .lug 1.4' Aand constantfy applies a pull-ingforce vvto the ,plunger `2`,. causing 'the latter to advance the rivetsy -IFalQngthe tulae toward-the inner or .deliveryend.lli` thereof. y

Soldered or :otherwise xedly mounted on the, inner or delivery end -l Blof the tube-.I` Lisa bracket il', said bracketincluding a sleeveportion. lv8-sur rounding or" partially surroundingthe tubeanda pair of spaced ears If9 and 20 projecting substantially radially of. the tube. .The-earswi andi!) formiasupport for an elongated siibstantiallyHU-i shaped coverv 2 l? 'which isadapted to be vreleasably held .in-closed position adjacentthe tube S''bya spring .clipf'z whchfi's ycarriedv bythe cover and engagea'ble with the tube adj a'cent' its outer' end, as shown inbroken..lines in .Figi .1`. AThexcoi'fer 2-l is lpivotally :connected 1 to the ears rta `and Vf2ll by' means 'of a .transverse pia 23 inermi-tsj 'th- CVel" t0 ifSVi'l'lllll'g Wl'dl' O1" fWay'-fifdlflil tube 9 duringvt'he'-loadingof` the'tube with rivets or thefl'ike. Between tne'ears' lelandllzirthere is'provi'ded a'- greoved roller24 which is rotatably' mounted onthepin'f and' around `which extends the ten-sion vspring lf5, said tensionspring ear-f tending longitudinally within the cover-21 'and having its vouter end suitably anchored thereto byr means' of a depressed lug-or theV l'ike'2`5`.

Mounted on 'the delivery -end f6 'of the 'tube'f' and'forvvard-lyof the 'bracket t1, there isa sleeve t'for'm'ed with a pluraii'tyof resilient "ngers'flf which normally converge toward tlieaiiizsoftthe tube `and wnicnarefadapted to retainltnje i'rirngif-` most rivet 28 being Afed vfrom said tube. 'Tire fingers "2 are stanniedv from the vsleeve /2`t -'and while being. of 'a resilient nature are normally suircierrtiy` rigid toy prevent tnees'cape ofthe irr-V4 nermost rivet 28 as it is urgedt'owardthef delivery end of the tube'by` the springurged plunger T2'. As a safety 'feature However, the presentinvemtion aims to provide a; means'{surrouridineiiandfri Contact with` 'the ends .of "the resilient *fingerswnerebysaid ends A'are prevented from being :on the work surface.

opened to release the innermost rivet until the tube has been moved to rivet feeding position. This safety feature includes a pair of arms 29 which are formed integral with the sleeve I8 and extend toward the delivery end of the tube but diverge outwardly away from the axis of the tube as shown in Figs. 3 and 4. The free ends of the arms 29 carry a member in the form of a yoke v3l) lformed with an annular portion 3l which overlies and is in contacting engagement with the converging fingers 21. The ends of the arms 29 are fixedly secured in notches formed in the laterally extending ends 32 of the yoke 30. It will thus be seen that the yoke 30, together with the bracket l1, is movable with the tube 9 relative to the sleeve 26 and fingers 21. In the position shown in Fig. 3 of the drawing, the yoke 30 is in frictional engagement with the converging ends of the fingers 21 so that said fingers are prevented from moving outwardly and thereyby assures retention of the innermost rivet 28 regardless of the amount of pressure being exerted on the series of rivets by the plunger i2.

A pair of arms 33 extend from the sleeve 2B in parallel relation to the fingers 21. However, the arms 33 extend beyond the lingers and have formed thereon laterally extending lugs 34 providing a bearing surface for engagement with the Work 35 and serve to hold the free ends of the resilientngers 21 in spaced relation to the work so that they can be readily spread apart by the deliveryend of the tube without scraping The arms'33 are guided through slots formed in the yoke 3B within the laterally extending ends 32 as more clearly shown in Fig. 2 of the drawing.

VIt will be seen from the foregoing description that? when the tube 9 has been charged with a series of rivets l0, and they are subject to feeding pressure by the plunger l2, the head of the innermost rivet 28 will be engaged by the convergehtv ends of the resilient fingers 21, and that rivet will be held with the stem thereof projecting from the tip of the device, as shown in Figs. 1 and 2, ready to be inserted into the opening 36 of the work 35. When it is desired to insert the stem of the rivet 28 into the opening 3B, the lugs 34 will be brought into engagement with the surface of the work. The arms 33, be-

ing .integral with the sleeve 26 and the fingers 21, will hold the fingers against longitudinal movement while the tube 9 is being advanced toward the-work. As the tube 9 slides forward within the sleeve 26 the arms 29, which are attached to the tube, move forward likewise carrying with them the yoke 30. The restriction to linger movement normally elected by the yoke 3G is thus removed and the delivery end of the tube 9 is brought into engagement with the fingers to spread them apart sufficiently to permit passage of the head of the rivet as shown in Fig. 4. When the rivet head moves past the resilient fingers, the rivet is projected or snapped into the work opening by the action of the spring l5. Thereupon, the tube 9 is released, and under the contracting action of the resilient fingers against the delivery end i6, the tubes moves rearwardly inthe sleeve 26, and the resilient fingers engage the head of the next rivet and hold the same in readiness for insertion into another opening of the work. Movement of the tube rearwardly carries with it the yoke 30 to again bring said yoke into bearing engagement with the converging ends of the resilient fingers. This action is repeated until the supply of rivets from within the tube has been exhausted, and when it is desired to obtain an additional supply, the cover 2l is raised to the full line position shown in Fig. 1 which permits the plunger l2 to be removed through the open end I3 by stretching the spring I1 as shown in broken lines in Fig. l. After loading the tube with rivets from a hopper or other source of supply, the plunger is again positioned in abutting' relation with the head of the rivet as shown in the drawing.

Although the foregoing description is necessarily of a detailed character, in order to completely set forth the invention, it is to be understood that the specific terminology is not intended to be restrictive or confining and it is to be i'urther understood that various rearrangements of parts and modifications of structural detail may be resorted to without departing from the scope or spirit of the invention as herein claimed.

I claim:

1. In a device for holding and delivering rivets or the like, an elongated hollow member forming a support for a plurality of rivets and having a delivery end, means for urging the rivets toward said delivery end, a sleeve surrounding said hollow member adjacent said delivery end and having convergent resilient fingers adapted to releasably retain the rivets in said hollow member, said hollow member being movable relative to lsaid sleeve for causing said delivery end to engage and spread said fingers for releasing a rivet therefrom, a bracket secured to and carried by said hollow member, a pair of arms extending from said bracket toward the delivery end of said hollow member, and means carried by the free ends of said arms having engagement with the convergent ends of said resilient ngers when the device is withdrawn from the work for preventing expansion of said fingers.

2. In a devce for holding and delivering rivets 01 the like, an elongated hollow member forming a support for a plurality of rivets and having a delivery end, means for urging the rivets toward said delivery end, a sleeve surrounding said hollow member adjacent said delivery end and having convergent resilient fingers adapted to releasably retain the rivets in said hollow member, said hollow member being movable relative to said sleeve for causing said delivery end to engage and spread said fingers for releasing a rivet therefrom, a bracket secured to vand carried by said hollow member, a pair of arms extending from said bracket toward the delivery end of said hollow member, and a yoke member attached to the free ends of said arms, said yoke member having an annular portion surrounding and engaging the convergent ends of said resilient lingers when the device is withdrawn from the work for preventing expansion of said lingers.

3. In a device for holding and delivering rivets and the like, an elongated hollow member forming a support for a plurality of rivets, means for urging the rivets toward the delivery end of said hollow member, a sleeve loosely surrounding said hollow member adjacent its delivery end, having means for engaging the work to space the sleeve a definite distance from the work and having convergent resilient iingers adapted to releasably retain the endmost rivet in the hollow member, the delivery end of said hollow member when the device is advanced toward the work engaging said fingers and separating them to release the endmost rivet, and means adapted when the device is withdrawn from the work to externally engage the convergent ends of said fingers for Number preventing their expansion. 2,377,506 WILLIAM R. KOVACS. 2,330,052 v 2,335,670 REFERENCES CITED 5 The following references are of record in the le of this patent: Number UNITED STATES PATENTS 582,409 Number Name Date 1 305,050 Cook Sept. 16, 1884 Name Date Tea, Dec. 21, 19'43 Henry et al Sept. 21, 1943 Harvey Nov. 30, 1943 FOREIGN PATENTS Country Date France Oct. 13, 1924 

